Paper making machinery



May 14, 1940. J. E. BOND.

PAPER MAKING MACHINERY Filed Oct. 19, 1938 2 Sheets-Sheet HP LHH 4 3- fHF I Fr -ht H lllllq J4 l I INVENTOR WWofia/Z q haz/ A TTORNEY May 14, 1940; .J. E. BOND PAPER MAKING MACHINERY Filed Oct. 19, 1958 2 Sheets-Sheet 2 INVENTOR A TTORNEY t 40 Fig. l is a top plan view of a pulping apparatus the outermost portions of the blades 24 and the 4 Patented May 14, 1940 I l I 'UNITED STATES PATENT OFFICE 2,200,410 PAPER MAKING mommy Joseph a. Bond, Middletown, Ohio Application 0mm 19, 1938, semu'n 235,127

Claims. (CI. 92-20) This invention relates to pulp handling appaportions l3 in the direction of the arrow shown ratus for disintegrating and agitating paper pulp in Fig. 1 by gravity action, the floor l4 being or the like. i "arranged at a suitable inclination and at a suit- One object of the invention is the provision of able height at the supply end ll above the dis- 5 an apparatus for handling paper pulp or the like charge end l2 so that the stock may circulate and 5 and embodying shredding and disintegrating flow into a receiver IS. The opening into the blades and impelling means so arranged as to receiver I6 is of large size, the upper inclined receive pulp from the discharge end of a circuwall H of the tank inclining downwardly as lating tank and return the pulp to a point in shown in Fig. 2 so that afree and substantially the circulating tank at the supply end thereof unobstructed passage is provided. 10 which is below the normal level of material in Within the receiver I6 is a shaft |8 operated the circulating tank, a portion of the pulp that at high speed by a suitable motor 25 and having passes the disintegrating 'and impelling blades a. series of stock disintegrating and. pulping being supplied to an auxiliary impelling means blades IS. The ends of the blades I9 which are and supplied to a point above the level of matefirst engaged by the pieces of pulp entering the rial in the tank so as to fall on the circulating receiver are spacedat a considerable distance material at a point between the supply end and from the walls of the receiver so that the stock the discharge end'of the tank. will be whirled, shredded and broken up into Another object of the invention is the provicomparatively small pieces'before the stock flows 20 sion of a pulp handling apparatus embodying a through the tapering passage 2| and into the 20 plurality of impeller chambers through which the discharge passage 22. The distance between the pulp is successively passed so as to travel in oppoends of the blades I9 and the walls of the passage site directions along a common shaft on which 2| decreases as the blades approach the throat the impellers are provided wherebyv the end of the passage to give a progressively increasing thrust on the shaft produced by the action of confining action on the pulp pieces as they are '25 one impeller will be balanced or counteracted by reduced in size in moving along the passage. the thrust of another. The stock is forced along into the discharge pas- Another object of the invention is the provision sage by means of impactimpeller blades 23 which of an apparatus of the character mentioned in operate rather closely to the cylindrical end of which stationary blades are provided adjacent an the throat 2|.

impelleriand cooperating'therewith so that any Adjacent the terminal end of the cylindrical small pieces of pulppassing the impeller will portion of throat 2|, the walls of the throat are be subjected to a shredding or disintegrating acprovided with inwardly extending blades 24 of tion and so arranged as to stop the whirling anysuitablenumber, two such blades being shown action of the pulp as it leaves the impeller. in Fig. 5. .The blades cooperate with the edges 35 Other objects and advantages of the invention of the impeller blades 23 so that any small pieces will be apparent from the following description, of pulp passing between the blades 24 and the the appended claims and the accompanying blades 23 will be torn apart without substantial drawings in whichcutting action. The minimum spacing between embodying the present invention; edges of the blades of the impeller 23 is not less Fig. 2 is a side elevation of the pulping appathan one-sixteenth of an inch or may be someratus; what greater than .that and even up to about Fig. 3 is a section on the line 3-3 of Fig. l; one-quarter of an inch so that any substantial Fig. 4 is a section on the line 4-4 of Fig. 3 cutting action is eliminated although the blades 45 and 24 operate to'provide a disintegrating action to Fig. 5 is a section on the line v 5-5 of Fig; 3. any f the larger pieces of pulp and also are Referring more particularly to the drawings by 4 effective in stopping the rotational whirling of the reference numerals, Ill generally designates the pulp as it leaves the end of the throat 2|. The

main circulating tank of a pulping apparatus end of the throat is also provided with an annu- 50 adapted for handling paper pulp to be defibered, lar ring 25' whose inside diameter is somewhat pulped or agitated. Pulp laps or stock pieces may' less than the inside diameter of the throat 2| be supplied to the tank at a suitable location to direct the flow from the walls of the throat 2| between the supply end II and the discharge somewhat towards the axis of the shaft on which end l2 and may circulate around the inner wall the impeller blades are provided.

A large part of the stock entering the discharge passage 22 flows upwardly through a flaring outlet pipe which extends to the supply end of the tank l0, emptying into the tank at a point below the normal level of the material in the tank. As shown in Fig. 2, the discharge passage 22 is of short length and extends up to an opening in the bottom floor portion of the tank so that the impact impeller 23 is only called upon to produce enough pressure to raise the stock at the desired rate of flow against the head existing in the tank at the supply end.

Some of the stock pieces that pass the impeller 23 may be of substantial size after passing only once into the zone of treatment where they are acted on by the blades I9, but the stock may circulate a number of times around the tank and from the supply end of the disintegrating and impelling blades l9 and 23 back through the discharge passage 22 so that eventually the stock pieces will be reduced to a condition fine enough to be used in the manufacture of paper or other fibrous sheets.

In.order that the large pieces passing the impeller 23 will be more effectively broken up and disintegrated, the discharge passage 22 of the first impelling means communicates by means of the pipe 21 with the second impeller chamber 28 shown in axial spaced relation with respect to the first impeller 23. The shaft l8 which carries the impeller 23 also carries impact impeller blades 29 in the second impeller chamber 28, the blades of the impeller 29 being inclined oppositely with respect to the inclination ofthe blades of impeller 23 so that while the impeller 23 operates to force material towards the left as viewed in Fig. 3, the impeller 29 forces the material toward the right and into the discharge passage 30 of the second impelling means; The endwise thrust created on the shaft l8 by the action of the impeller 23 is thus counteracted by the oppositely directed thrust of impact blades 29, and the bearings of the shaft l8 and thus relieved from any large endwise thrusts.

Adjacent the edges of the blades 29 of the second impact impeller there is a series of stationary blades 32 arranged in the casing walls 33 which provide an enclosure serving as the discharge passage of the second impeller. These blades 32, as shown in Figs. 3 and 4, extend substantially radially so as to project inwardly beyond the outer ends of the impact impeller blades, theedges 35 of the stationary blades being spaced a small distance of at least one-sixteenth of an inch or up to one-quarter inch from the edges 36 of the impact impeller blades 29 so that any small pieces of pulp will be effectively disintegrated and torn apart, without substantial cutting action, as those pieces pass from the supply end to the discharge end of the second impeller. They also serve to stop the rotational whirling of the pulp as the pulp enters the discharge passage 30. The outer sides of the blades 32 are interconnected by a baille wall 31 which directs the flow of material inwardly towards the shaft axis. blades 32 and the bailie wall 31 are preferably made integral with an outer flanged ring to form a readily replaceable unit that may be bolted in place between flanged portions of the casing structure, as shown in Fig. 3.

The impeller 29 receives stock under some substantial pressure produced by the impact impeller 23, and supplies the stock to the discharge passage 30, which is separated from the discharge passage of the first impeller by means of a partition wall 38. An outlet pipe 39 however extends from the discharge passage 30 so that the stock after passing into the discharge passage 39 can be supplied to a suitable point above the level of the material in the circulating tank and act as a submerging stream, falling onto stock pieces that may be floating on the surface of the material in the tank and thus submerging the floating pieces. The pieces are thus submerged so that they may more readily pass down through the inclined passage and into the receiver IS. The pipe 39 which carries the stock from the discharge passage 39 of the second impeller, as shown in Figs. 1 and 2, extends upwardly between the supply and discharge ends of the tank and then projects substantially horizontally above the top of the tank, as indicated at 40, and discharges into a conduit 4| which extends transversely preferably the full width of the supply end of the tank. The lower wall of the conduit 4| is provided with a passage or slotted opening 42 extending across the tank, the conduit 40 being arranged at a suitable location between the supply and discharge ends of the tank and preferably just ahead of the upper end of the inclined wall ll so that the submerging stream which falls downwardly through the slot 42 and onto the circulating material in the tank, or pulp laps that have just been added, will effectively submerge floating stock pieces and cause them to travel more readily down under the inclined wall H.

The horizontally extending portion 4|] of the pipe 39 is preferably provided with a control valve '93 which is operated manually or otherwise to control the rate (if flow into conduit 4| Adjacent the upper end of the pipe 39 the latter may also communicate with an auxiliary or branch pipe 44 having a control valve 45 and extending to a point above the stock level in the tank and near the supply end of the tank. Some suitable quantity of stock may thus be supplied to the upper level of stock near the supply end of the tank while the main flow of stock into the tank comes upwardly through the larger supply pipe 22, the added flow through pipe 44 providing a more thorough mixing action especially when the apparatus is used for deinklng or agitation purposes. The relative sizes and capacities of the pipes or passages 39 and 22 and of the impelling means for forcing material through those pipes.

- is supplied with stock under a pressure corresponding to that which exists at the discharge side of the first impeller, it will be apparent that neither of the successively acting impeller means is called upon to raise the material which it handles to an unnecessarily large height.

While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

described comprising a first chamber having inlet and outlet passages, a circulating tank for receiving material from tlie outlet passage and circulating the material to the inlet passage of said first chamber, a shaft rotatable in said chamber and provided with impact impeller blades having propulsive surfaces inclined to thei -plane of rotation to force the material handled in one direction along the shaft from the inlet to the outlet'passage of said chamber, an auxiliary chamber having an inlet passage communicating with the outlet passage of said first chamber at a point ahead of the tank and having an outlet passage extending to the tank above the level of the material'in the tank, and auxiliary impact impeller blades on said shaft having inclined propulsive surfaces for forcing material in an opposite direction along the shaft to the outlet passage of the auxiliary chamber.

2. Pulp handling apparatus of the character described comprising a first chamber having inlet and outlet passages, a circulating tank for receiving material from the outlet passage and circulating the material to the inlet passage of said first chamber, a shaft rotatable in said chamber and having a series of stock disintegrating blades for whirling and shredding stock pieces supplied thereto and provided with impact impeller blades having propulsive surfaces inclined to the plane of rotation to force material in one direction along the shaft from the inlet to the outlet passage of said chamber, an auxiliary chamber having an inlet passage communicatingwith the outlet passage of said first chamber at a point ahead of the tank and having an outlet passage extending to the tank above the level of the material in the tank, auxiliary impact impeller blades'on said shaft having inclined propeller blades for disintegrating material passing said auxiliary blades.

3. Pulp handling apparatus of the character described comprisinga first chamber having inlet and outlet passages, a circulating tank for receiving material from the outlet passage and circulating the material to the inlet passage of said first chamber, said tank having an inclined floor sloping downwardly to the said inlet passage and having a substantially horizontal opening in said floor at one end thereof, a supply pipe having its upper endterminating at said opening and communicating at its lower end with the outlet passage of said first chamber, a shaft rotatable in. said chamber and provided with impact im-.

peller blades having propulsive surfaces inclined to the plane of rotation to force the material handled in one direction along the shaft from the inlet to the outlet passage of said chamber, an auxiliary chamber having an inlet passage communicating withthe outlet passage of, said first chamber at a point ahead of the tank and 4., Pulp handling apparatus ofthe character described comprising a first chamber having inlet and outlet passages, a circulating tank for receiving material from the outlet passage and circulating the material to the inlet passage of said first chamber, said tank having an inclinedfioor sloping downwardly to the said inlet pas- I sage and having a substantially horizontal opening in said floor at one end thereof, a upply pipe having its upper end terminating at said opening and communicating at its lower end with the outlet passage of said first chamber, a shaft rotatable in said chamber and provided with impact impeller blades having propulsive surfaces inclined to the plane of rotation to force the material handled in one direction along the shaft from the inlet to the outlet passage of said chamber, an auxiliary chamber ,having an inlet passage communicating with the outlet passage of said first chamber at a point ahead of the tank so as to be subjected to the pressure created I by the impact impeller blades in said first chamber, said auxiliary chamber having an outlet passage extending to a point between the supply end and the discharge and of the tank above the saidfirst chamber, said tank having aninclined floor sloping downwardly to the said inlet passage and having a substantially horizontal opening in said floor at one end thereof, a supply pipe having its upper end terminating at said opening and communicating at its lower end with the out- .let passage of said first chamber, a shaft rotatable in said chamber and provided with impact impeller 'blades having propulsive surfaces inclined to the plane of rotation to force the material handled in one direction along the shaft fromthe inlet to the outlet passage of, said chamber; an auxiliary chamber having an inlet passage communicating with the outlet passage 7 of said first chamber at a point ahead of the tank so as to be ubjected to the pressure created by.

the impact impeller'blades in said first chamber, said auxiliary chamber having an outlet passage extending to a point between the supply end and the discharge end of the tank above the normal level of material at such point for supplying the material from said second chamber onto the material in the tank, and having a branch discharge passage, a distributing tank above the level of material in said tank adjacent.

the discharge end of the tank and in communication with said branch discharge passage for projecting a stream of material the width of the tank at such point onto the material in the tank,

1 and auxiliary impact impeller blades on said "shaft having inclined propulsive surfaces for forcing material along the shaft to the outlet passage of the auxiliary chamber.

JOSEPH E. BOND. 

